Question

Fill in the blanks
• molecular formula of chloride of an element x is xcl this compound solid having high melting point. which of the following elements be present in same group as X
1. Na
2. Mg
3. Al
4. Si
Answer:- ??​

Answer 1

So, according to question it has molecular formula XCl it means compound X has valency +1 and we know that Cl has valency -1.

So we form compound by using this method .

> Na is the right answer because Na has valency +1and Cl have valency -1 so compound form NaCl which have very high melting point.

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